Process of making reinforced spiral pipe.



F. W. COLBY.

PROCESS 0F MAKING REINFORCED SPIRAL PIPE.

APPLICATION FMD nov. It. 19o?. nfncwiu MN. al. |917.

1 ,238,986. Patented Sept. 4, 1917.

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F. W. COLBY.

Pnocsss oF MAKING nsmroncso sPmAL PIPE. APPLICATION FlLfD NDV lh |901 REEWED JAN. 31| 1,238,986.

F. W. COLBY.

PROCESS 0F MAKING REINFORCED SPIRM. PIPE. APPLICATION FILED NOV. Il. 190?. RENEWED MN. 3l. |917- 1,238,986. PatentedSept. 4, 1917.

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FRANK W. COLBY, 0F CHICAGO, ILLINOIS, ASSIGNOB,

MENTS, T0 STANDARD SPIBAL PIPE WORKS, 0F

TION 0F SOUTH DAKOTA.

BY DIRECT AND MESNE ASSIGN- CHICAGO, ILLINOIS, A CORPORA- PBOCESS 0F MAKING REINFOBCED SPIRAL PIPE.

Specification ot Letters Patent.

Patented Sept. 4, 1917.

Application led November 11, 1907, Serial No. 401,583. Renewed January 81, 1917. Serial No. 145,817.

To all whom it may concern.'

Be it known that I, FRANK W. COLBY a citizen of the United States, residin at Chicago, in the county of Cook and tate of Illinois have invented a certain new and useful Improvement in Processes of Making Reinforced Spiral Pipe, of which the following is a specification.

This invention relates to a process of making reinforced pipe, and has for its object to provide a new and improved process of this description.

Figure 1 is a plan `view of one form of apparatus for carrying out my roces's;

Fig. 2 is a sectlonal view ta en on line 2 2 of Fig. 1;

Fig. 3 is a sectional view taken on line `a-s of Fig. 1;

Fig. 4 is a sectional view taken on line 4-4 0f Fig. 1;

Fig. 5 is a sectional view 5 5 of Fig. 1;

Fig. .6`is a sectional view 6 6 of Fig. 2;

g. 7 is a sectional view taken on line 7 7 of Fig. 2;

lFig. 8 is a sectional view 8 8 of Fig. 2;

Fi 9, 10, 11, 12 and 13 are views showing Se shape of the metal at different steps of the formation of the pipe.

taken on line taken on line taken on line Any desired process may be used forx forming the pipe.

In the present case I have illustrated one form of apparatus by means of which a strong, continuous and reinforced pipe is formed from comparatively narrow strips of metal. Stri s of metal of any desired size may be use As herein shown the pipe is formed from the two strips of metal 1 and 2. Some means is provided for bending the edges of these strips. As herein shown the edges of the strip l are bent upwardl by means of suitable rollers between whic it passes. In\the apparatus herein shown the first set of rollers 3 and 4 (see Figs. 1 and 6) partially bend these edges. The roller 4 1s cut away at the middle and the roller 3 lits into this cut away portion, the two rollers having beveled faces at 12 and 13 which cause the' edges of the strip to be The strip then passes between t e rollers 5 and6 (see Fig. 7). The roller 6 is spool shaped and the roller 5 fits therein right angles to the body portion. A simi ar set of rollers 7, 8, 9 and 10 act u on the strip 2 and bend the edges thereof own. These rollers may be operated in any desired manner, and as herein shown are driven from the shaft 11. This shaft directly drives the roller 3, the roller 4 being driven by means of suitable pinions 14, 15. A ar 16 on shaft 11 engages a gear 17 on iee shaft 18 carryin the roller 6, while the shaft 19 carrying t e roller 5 is driven by means of the pinions 20 and 21. In view of the fact that the roller 6 is driven from the up er roller 3 it will be noted that both sets o rollers will move in the same direction so as to assist in pulling the strip of metal therethrough. The gear 17 meshes with gear 22 connected with roller 7 so as to drive it, and roller 8 is driven from roller 7. The ear 22 engages a gear 23 which drives rol er 10 and roller 9 is driven therefrom, the two sets of rollers being driven in the same direction so as toA assist in pulling the strip 2 therethrough. The two rollers of each set, of course, are driven in opposite directions in the usual manner. The strip 1 may be termed the main strip, and the strip 2 the'reinforcing strip. The su ports 24 for the bearings of the various ro 1ers are preferably adjustably mounted upon the frame 25 so that they may be spread apart to permit rollers of different lengths to be used in order that strips of material of different widths may be formed into pi e. The frame 25 is also adjustable upon t e base 27 so as to secure a further adjustment. The parts are arran ed to produce a universal adjustment. is is accomplished in the drawing by providing the foot 28 -fwith a slot 29, and the base w1th a diagonal slot 30 and fastening the foot to the base by a bolt 31. It will be seen that any desired adjustment ma thus be secured. These rollers may be ca ed the shapin rollers. After the edges of the strips 1 an 2 'are properly bent the strips are curved or bent into a spiral, and the adjacent edges edge 44 can be interlocked the cylinder being cut away opposite these rollers so that they may com ress between them anythin passing aroun the cylinder. These two rol ers are driven `in any desired manner, as, for example, by'means of the shafts 35 and 36 connected by gears 37 with the pulley 38. These uniting rollers may be driven from the same source of power as the shaping rollers, and the two sets' of rollers are preferably driven at the same periph eral speed so that the strips of material will be properly fed between them. The shaft 35 is mounted in a suitable bearing 39, and the shaft 36 in a suitable bearing 40. The bearing 40 is adjustableso that the space between the rollers may be varied. As herein shown this'bearing is mounted upon the frame 41 by means of the bolt'42 there being a slot 43 to permit proper adjustment. In uniting the strips Ofmaterial the strip 1 is first formed into a part of a spiral. This is preferably done by giving it, say, one turn about the cylinder 32. I have found that if the bent ed 44 is .left in proper position to `be inter ocked with the bent edge of the strip 42 it will be injured 'when` bent about the cylinder 32. In order to prevent this injury I therefore provide an edge-attening device 45 which bends the `44 back upon the bod of the strip 1 so that in assing around t e cylinder it is not injure This flatteningdevice may be of any desired construction, andas herein shown consists of a wheel or disk fastened to the cylinder 32 (see Fig. 5). Before the w'ith the edges of the strip 2 it must be ain loosened or raised to its proper' inter ocking position. Some suitable loosening or' raising device may be provided. As herein shown such a device 46 is provided. This loosening or raising device as herein shown consists of a disk with a beveled edge located so that the beveled edge assing overl the iiattened edge of the strip oosens or lifts it to its interlocking position. This loosening or raising device is` preferably position may be varied toadjust it to strips of different widths. connected to`a supportin piece 47 which is adjustably connected to t e frame b means of the bolts 48* which pass throng 49* in the support. When the'twc edges of the strip 1 are brought o posite each other b the tux-n about the cyhnder 82, the bent of the strip 2 are brought into prox` of the str1 .'1 and some means is provided for inter these edges. As herein shown the inter ocking device consists ofthe beveled wheels tween which the strip 2 p said veled wheels bein adjustably supported upon a sup orting evice 49 attached to a suitable fixes part. These wheels 48 are"` adjustable upon the support seas. tor 's th de vice As .herein shown it is adjustable so that its a slot" otherwise position shown in Fig; 11.

for strips of various widths. This adjustment is secured by providing the support with a slot 50 (seeFlgs. 1 and 3), and connectilrglthe rollers thereto by means of bolts 51. e support 49 may be connected with the bearing su port for the rollers 9 and 10 so that it will e moved to a roper position when the parts are adjusted or using strips of various widths.l When the adjacent bent edges of the strip 1 and the strip 2 and the bent edges thereof pass between these rollers 48 they cause the bent edges to interlock as shown in Figs. 3 and 12. These interlocking edges then pass between the rollers 33 and 34, andare clamped or united together, the parts then being moved to the position shown i'n Fig. 13. The strips 1 and 2 are thus ulled along, and formed intospirals and astened or united together so as to form a continuous spiral pi e, such pipe being reinforced, as it were, y the str1 2 so as to be made strong and durable. A er the pipe is formed it may be galvanized or treated, and the joints between the two strips may be soldered or otherwise treated, althou 'h Suchtreatrnent is not ordil narily require the joint being tight and y secure as soon as the pipe is formed.

It will be noted that in carrying out this process, two strips of material are provided. The edges of these strips are then bent so that they will be at an angle with the main bod of the strips. One bent edge of one of t e strips is then bent down and a portion of such strip formed into spiral cylindrical form. After said portion has been formed into s iral cylindrical form, the bent down edge is loosened up and then one edge of the other strip is positively tucked under the bent edge of the portion of the first strip which has been formed into spiral cylindrical form and the other edge of the other strip is positively tucked under the other edge of the first strip before that ortion of the first strip is formed into spira cylindrical form, and then said bent edges are compressed so as to cause them to interlock and overlap to form a continuous pipe of great strength and durability which can resist iuternal and external pressure and remain intact under such pressure.

The vuse and operation of my invention are as follows:

The edges of the two strips' of material are properly bent by passing them between the respective rollers. When the` strip 1 p between .the rollers '3 and 4 each edge takes the position shown in Fig.` 9. When the stri 'p :et: between the rol ers 5 and-6 each kes the position shown in :F ig. 10. en the Astrip 2 passes between its two sets of rollers the edges thereof take the The strips are then" passed' about the cylinder 32, the edge 44 being first turned down by the {lattening device 45, such edge after passing around the cylinder and just before reaching its interlocking position, heilig loosened or turned up by the loosening device 16, as shown in Fig. 8. The interlocking device then' acts on the adjacent edges of the strip 1 and the edges of the strip 2, moving them into the interlocking osltion shown in Fig. 12. These edges t en pass between the uniting rollers 33 and 34, whereupon they are mashed down and fastened firmly together, as shown in Fi 13. The process is then continued and t e pipe formed of any desired length, such pipe being reinforced by the strip 2.

I claim:

1. The process of making pipe which consists in providing a plurality of strips of material, then bending the edges of said strips, then bringing theedges of the strips into proximity, then positively tucking the bent edges of one strip beneath the bent edges of the other strip and then compressing and flattening said bent interlocking edges as the strips are given a s iral form so as to ermanentl overlap an interlock them to orm a sing e continuous pipe.

2. The process of making pipe which consists in providing a plurality of fiat strips of material and setting said strips in motion at substantially the same speed, then while the strips are in motion bending the edges of one strip in one direction and the edges ofthe other strip in the opposite direction, then while the strips are still in motion forming them successively into spiral form and positively tuckin the bent edges of one strip beneath the bent edges of the other strip and then at a point in advance of the point where the bent edges of one strip are tucked beneath the bent edges of the other Stal-pip, flattening said bent edges so as to y unite them to form a continuous spiral pipe.

3. The process of making spiral pipe which consists in providing a plurality of fiat strips of material, then simultaneously setting said strips in motion, then bending the edges of adjacent strips in opposite directions so that they project at an angle to the middle portions of said strips, then interlocking said bend edges by tucking the bent edges of one strip beneath the bent edges of the other strip and then after the edges of the strips have been thus interlocked flattening said bent edges and forming said strips into spirals so as to form a continuous pipe. 0

4. The process of making pipe, whlch consists in providing two strips of .materlah then bending the edges of one strip 1n one direction and the edges of the other strip 1n the opposite direction, then forming a por tion of a spiral with one strip and at the same time bending down one of the bent edges thereof, then loosening up said bent edge so as to provide a space between it and the other portion of the strip, then uniting the edges of one strip with the adjacent edges of the other strip and forming both of said strips into spirals.

The process of making pipe which consists in providing two strips of material, then simultaneously setting said strips in motion, then bending the edges of said strips while in motion, then positively tucking the bent edges of one strip into the space between the other strip and the bent edges thereof and then forming said strips into a spiral and compressing the bent edges thereof so as to firmly unite the strips together to form a spiral pipe. i

6. The process of making pipe which consists in providing two strips of material, then bending the edges of said strips so that they will be at an angle with the main body of said strips, then forming a portion of one of said strips into spiral cylindrical form and then positively tucking one bent edge of the other strip under the bent edge 4of the portion of the first strip which has been formed into spiral cylindrical form` and the other edge of the other strip under the other edge of the first strip before that portion of the first strip is formed into spiral cylindrical form and then bending said bent edges so as to cause them to interlock and overlap to form a continuous pipe.

7 The process of making pipe which consists in providing two strips of material, then bending the edges of said strips so that they will be at an angle with the main body of said strips, then bending down one bent edge of one of said strips and forming a portion of said strip into spiral cylindrical form and then after said portion has been formed into spiral cylindrical form loosening up said bent down edge and then positively tucking one edge of the other strip under the bent edge of the portion of the first strip which has been formed into spiral cylindrical form and the other edfge of the other strip under the other edge o the first strip before that portion of the first strip is formed into spiral cylindrical form and then bending said bent edges so as to cause them to interlock and overlap to form a continuous pipe.

8. The process of making pipe which consists in providing two strips of material, then simultaneously setting said strips in motion, then bending the edges of said strips at an angle with the body thereof, then forming said strips into a cylindrical form and bending one edge down while in a cylindrical form and then raising said edge when it is desired to interlock it with the adjacent edge and then interlocking the edges of said strips to form a spiral pipe.

9. The process of makingpipe which consists in providing two strips of material havin their, edges bent at an main ody thereof, then formingJ ortion of a spiral with one of said strips an bending one ed e of -seid spiral portion down while it is eing formed into a. spiral and then raising the edge as it a preaches the other edge of seid piece and en interlockgie. to rthe ing and permanently fastening the edges of the two pieces together to form a oontinnous s iral 1 f1 p Ppe FRANK W. COLBY. Witnesses:

Emu K. REYNOLDS,

Serum B. WERNER. 

